package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和口味
     */
    public void saveWithFlavor(DishDTO dishDTO){
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //向菜品表插入1条数据
        dishMapper.insert(dish);
        long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }
    //分页查询
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);//后绪步骤实现
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否可以删除--是否存在起售的菜品
        for (Long id : ids){
            Dish dish = dishMapper.getById(id); //后绪步骤实现
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new RuntimeException("当前菜品正在起售中，不能删除");
            }
        }

        //判断当前菜品是否可以删除 是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDishId(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            //当前菜品被套餐关联 不能删除
            throw new RuntimeException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        for (Long id : ids){
            dishMapper.deleteById(id); //后绪步骤实现
            //删除菜品的口味数据
            dishFlavorMapper.deleteByDishId(id); //后绪步骤实现
        }

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {

        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);//后绪步骤实现

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;

    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        dishFlavorMapper.deleteByDishId(dish.getId());
        //重新插入数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0 ){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表查入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }


    public List<Dish> list(Long categoryId) {
        Dish dish = new Dish().builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


}
